It can be modded so that when the unit is created, it comes with some troops.
But it doesn't matter really if the unit can move or not, and it doesn't affect the corps in anyway that I can notice if I attach it to an HQ without a leader, or staff. And with easy supply rule on, it wont even effect supply/replacement points, since all supply/replacements flow from OKH directly to the unit on the map. Just buy the HQ on the first turn, and wait for the Trucks/Staff to appear (which it will) and for the commander to appear (which he will).
Then transfer the Rumanians when the spirt gets high enough (or attack with them to keep it lower)
As for the 10 PP points for the HQ, well..that is a very minor drop in the bucket. I get about 40 pp a turn, and I am on turn um, 54 so that is about 1500 - 2000 pp I have gained so far. Spending 10 on a useful unit is hardly a hardship.
“My logisticians are a humorless lot … they know if my campaign fails, they are the first ones I will slay.” – Alexander the Great